JP3788979B2 - Induction heating type equipment for hot rolling equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an induction heating type apparatus for hot rolling equipment, and more particularly to an induction heating type apparatus for hot rolling equipment comprising a transverse heater.
[0002]
[Prior art]
In order to obtain a high-quality hot-rolled steel sheet or strip, the rough bar supplied to the finishing mill needs to have a predetermined temperature and temperature distribution. Therefore, in recent years, it is the provision of induction heating type device has been proposed between the rolling mill train finish the rough rolling mill train (for example, see Patent Document 1).
[0003]
FIG. 7 schematically shows a part of a hot rolling facility equipped with the induction heating apparatus. The slab S heated in a heating furnace (not shown) is rolled into a rough bar B by a rough rolling machine row 1. The coarse bar B is heated by the induction heating type device 2 so as to have a predetermined temperature and temperature distribution. The tip of the coarse bar B is sheared and removed by the crop shear 3 so as not to cause a trouble of biting into the finishing mill. Next, the coarse bar B is finish-rolled to a steel plate or steel strip having a predetermined plate thickness and shape by the finish rolling mill row 4.
[0004]
Of induction heating type device comprises a transverse-type induction heating device 90 is an inductor 40 and the lower inductor 45 on spaced upper and lower positions across the strip passing line (see FIG. 8). The upper and lower inductors 40 and 45 are lifted and lowered by the upper inductor lifting and lowering device 50 and the lower inductor lifting and lowering device 60, respectively, for adjusting the gap with the coarse bar B.
[0005]
By the way, in the conventional induction heating type apparatus 90, the inductor holding frame 94 is integrally formed by the support column 95 and the top frame 96 and is fixed on the carriage 12. The upper and lower inductors 40 and 45 are suspended from the top frame 96, and the upper and lower inductor lifting devices 50 and 60 are attached to the top frame 96. The inductor holding frame 94, the upper and lower inductors 40 and 45, the upper and lower inductor lifting devices 50 and 60, and the carriage 12 form one unit.
[0006]
If any of the upper and lower inductors 40, 50 fails, the unit in the online position is lifted and moved to the offline position. Then, as shown in FIG. 9 , the spare unit prepared in advance is replaced. For this reason, there are the following problems.
[0007]
The upper and lower inductors 40 and 45 rarely fail at the same time. However, since the upper and lower inductors 40 and 45 are integrated as a unit with the chassis 12 and the like, the chassis 12 including the upper and lower inductors 40 and 45 is included even when either the upper or lower inductor fails. All must be exchanged. Therefore, in addition to the upper and lower inductors 40 and 45 as spare parts, members and devices such as the carriage 12, the inductor holding frame 94, the upper and lower inductor lifting devices 50 and 60, and the like are required. It was.
[0008]
[Patent Document 1]
Japanese Patent Laid-Open No. 10-137807 (page 4, paragraph [0029])
[0009]
[Problems to be solved by the invention]
This invention solves the above-mentioned problem, and it aims at providing the induction heating type | formula apparatus for hot-rolling equipment which can reduce significantly the number of members or the number of spare parts, such as an inductor, and cost. Yes.
[0010]
[Means for Solving the Problems]
An induction heating type apparatus for hot rolling equipment according to the present invention includes a carriage that is movable in a direction perpendicular to a rolling line, an inductor holding frame, upper and lower inductors, and upper and lower inductor lifting devices. A first induction frame and a second column in which the inductor holding frame extends upward from the upper surface of the carriage, and a first top frame and a first frame that are detachably attached to the upper end of the first column. A second top frame attached to the upper end of two struts, wherein the upper and lower inductors are suspended from the first top frame and the second top frame, respectively, so that the upper and lower inductor lifting devices are Each is attached to the first top frame and the second top frame.
[0011]
In the induction heating type apparatus for hot rolling equipment, since the first top frame is detachably attached to the upper end of the first support column, only the first top frame, the upper inductor, and the upper inductor lifting device are integrated upward. Can be lifted and removed. When the first top frame, the upper inductor, and the like are removed, the upper portion of the lower inductor is opened, so that the lower inductor can be easily removed. Therefore, since only the failed inductor can be replaced, it is sufficient to prepare one inductor as a spare part. Spares such as a cart, an inductor holding frame, and an inductor lifting device are not required. For this reason, the number or number of spare parts and the cost can be significantly reduced. Moreover, since the top frame is divided into the first top frame and the second top frame, it is not necessary to remove the upper and lower inductor lifting devices, and the inductor can be easily removed.
[0012]
It is preferable that a guide plate for guiding the first top frame and the inductor when the first top frame is lifted or hung is provided on the second top frame. When the inductor is removed and installed online, the accuracy cannot be ensured due to lateral run-out due to the positioning by the crane, and the inductor may collide with the second strut, second top frame, second inductor lifting device, etc. there were. The guide plate prevents the inductor from colliding, and the inductor can be removed and attached smoothly.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
The implementation of embodiment of the present invention will be described with reference to Figures 1-4. 1 is a front view schematically showing the entire induction heating apparatus of the present invention, FIG. 2 is a front view of the main part of the induction heating apparatus including an inductor, FIG. 3 is a plan view of the main part, and FIG. It is a side view of the said principal part.
[0014]
The induction heating type apparatus 10 is mainly composed of a carriage 12, an inductor holding frame 20, an upper and lower inductors 40 and 45, and upper and lower inductor lifts 50 and 60.
[0015]
The carriage 12 has a rectangular carriage surface, and a drive motor 14 is provided near the rear end of the carriage. The carriage 12 travels in the longitudinal direction of the carriage 12 on a rail 13 laid on a base 18 on the foundation 16. The rail 13 extends in a direction perpendicular to the rolling line and to a position beyond the rolling line. The carriage 12 moves from offline (a retreat position from the rolling line) to online (a position of the rolling line).
[0016]
The inductor holding frame 20 includes a first column 21 and a second column 31, and a first top frame 22 and a second top frame 32. The first support column 21 extends upward from the central portion in the width direction of the chassis surface, and a first top frame 22 having a shape in which four rectangular corners are cut off at the upper end is detachably attached with a bolt or the like. Suspension fittings 23 are provided at four locations on the upper surface of the first top frame 22. The first top frame 22 and the upper inductor 40 can be lifted off-line by hanging a crane hook (none of which is shown) on the suspension fitting 23. Since the upper side of the lower inductor 45 is opened by lifting the upper inductor 40, the lower inductor 45 can be taken out.
[0017]
The second support column 31 extends upward from the four corners of the chassis surface. The second support column 31 has an L-shaped cross section, and four second top frames 32 having substantially square shapes are fixed to the second support columns 31 at the upper ends. The second top frame 32 is located at a notched portion of the first top frame 22. Therefore, when the first top frame 22 is lifted, the first top frame 22 and the second top frame 32 do not interfere with each other.
[0018]
The upper inductor base 25 is composed of a U-shaped frame whose longitudinal section along the rolling line direction (perpendicular to the paper surface in FIG. 2) opens upward. The upper inductor base 25 is connected to an output shaft of a later-described screw jack 51 and is suspended from the first top frame 22 so as to be lifted and lowered. Guide shafts 29 protrude downward from four locations on the lower surface of the first top frame 22. The guide shaft 29 is fitted into four shaft holes 27 provided at the top of the upper inductor base 25 to prevent the upper inductor 40 from being displaced and shaken.
[0019]
In the vicinity of the upper surface of the carriage 12, a rectangular inductor-shaped lower inductor base 35 is disposed. Connection blocks 36 are fixed to the four corners of the lower inductor base 35, respectively. The connection block 36 is pin-connected to the lower end of an output shaft 63 of a hydraulic jack 61 described later via an intermediate shaft 65. Guide shafts 38 projecting from four positions on the upper surface of the carriage 12 are fitted in the shaft holes 37 of the connecting block 36 to prevent the lower inductor 45 from being displaced and shaken.
[0020]
The inductor includes an upper inductor 40 and a lower inductor 45. The upper and lower inductors 40 and 45 have a heating coil 47 and an iron core 48 (see FIG. 4) housed in box-shaped covers 41 and 46, respectively. The upper inductor 40 is mounted on the upper inductor table 25, and the lower inductor 45 is mounted on the lower inductor table 35, respectively.
[0021]
The inductor lifting device includes an upper inductor lifting device 50 and a lower inductor lifting device 60. The upper inductor lifting device 50 includes four screw jacks 51 attached to the first top frame 22. An upper inductor raising / lowering motor 52 is provided on the first top frame 22, and a transmission shaft 54 is connected to an output shaft 53 of the motor 52. The transmission shaft 54 is connected to the first distributor 55 and further connected to the second distributor 56 via an intermediate bearing 58. The output shaft 57 of each distributor 55, 56 is connected to the screw jack 51. An absolute encoder 59 is provided on the first top frame 22. The absolute encoder 59 is connected to the transmission shaft 54 and detects the absolute height position of the upper inductor 40.
[0022]
The lower inductor lifting / lowering device 60 includes four hydraulic jacks 61 attached to the upper end of the second top frame 32. The output shaft 62 of the hydraulic jack 61 extends downward, and the upper end portion of the intermediate shaft 65 is pin-connected to the lower end portion. A lower end portion of the intermediate shaft 65 is pin-connected to the connection block 36. A hydraulic oil pipe 63 is connected to the hydraulic jack 61.
[0023]
A table roll 6 for conveying the rolled material is arranged along the rolling line. A roll support frame 75 is provided on the base 18 before and after the inductor holding frame 20, and a table roll 6 is attached to the upper end of the frame 75.
[0024]
In the induction heating type apparatus 10 configured as described above, the carriage 12 is advanced in advance before the start of rolling, and the upper and lower inductors 40 and 45 are positioned online. The gap between the upper and lower inductors 40 and 45 is set so that a predetermined gap is generated between the upper and lower inductors 40 and 45 and the coarse bar B during rolling. Also, if the tip of the rough bar is warped or warped, the tip of the rough bar will not hit the lower inductors 40 and 45 before entering the induction heating type device. The gap is adjusted in advance. The setting or adjustment of the gap between the upper and lower inductors 40 and 45 is performed by the upper and lower inductor lifting devices 50 and 60. When the rough bar tip passes between the upper and lower inductors 40 and 45, the gap is returned to the predetermined gap.
[0025]
In the induction heating type apparatus configured as described above, when a failure occurs in the upper inductor 40 among the upper and lower inductors 40 and 45, the passage of the coarse bar B is stopped. Next, as shown in FIG. 5 , only the first top frame 22, the upper inductor 40, and the upper inductor lifting / lowering device 50 are integrally lifted and removed by a crane (not shown) or the like. Then, the spare inductor (iron core and coil) 49 is replaced. In the case of the upper inductor 40, it can be exchanged online, and there is no need to move the carriage 12 offline. The coarse bar B may be on the rolling line.
[0026]
When the lower inductor 45 fails, first, the first top frame 22, the upper inductor 40, etc. are removed. When the first top frame 22, the upper inductor 40, and the like are removed, the upper portion of the lower inductor 45 is opened, so that the lower inductor 45 can be easily removed. When the coarse bar B is on the rolling line, the coarse bar B must be cut on the rolling line. However, since the upper portion of the coarse bar B is open, the cutting operation is easy.
[0027]
Since the top and bottom inductors have the same structure, it is sufficient to prepare one as a spare part.
[0028]
At the time of rolling stop or maintenance, the carriage 12 is retracted, and the upper and lower inductors 40 and 45 are placed offline.
[0029]
When lowering lifting or hanging the first top frame, it is preferable to provide a guide plate 77 for guiding the first top frame 22 and the inductor 40, 45 as shown in FIG. 6 in the second top frame 32. The guide plates 77 are paired facing each other in the longitudinal direction of the first top frame 22 (left-right direction in FIG. 6 ). The guide plate 77 has a width substantially equal to the width of the first top frame 22, a height slightly higher than that of the second inductor lifting device 60, and an upper half portion that is slightly opened upward.
[0030]
When removing and installing the inductors 40 and 45 online, accuracy cannot be ensured due to lateral vibration or the like because positioning is performed with a crane, and the inductors 40 and 45 are the second support column 31, the second top frame 32, and the second inductor. There was a risk of collision with the lifting device 60 or the like. The guide plate 77 prevents the inductors 40 and 45 from colliding, and the inductor can be removed and attached smoothly.
[0031]
【The invention's effect】
In the induction heating type apparatus for hot rolling equipment according to the present invention, only a failed inductor can be replaced, and therefore, one inductor may be prepared as a spare part. Spares such as a cart, an inductor holding frame, and an inductor lifting device are not required. Therefore, Ru can be reduced the number of members spare or number and costs significantly (for example, about 50%). Also, when the inductor exchange working offline, on, since the lower inductor are separated, struts and the top frame can be quickly exchanged inductor compared to the structure together.
[Brief description of the drawings]
[1] which was shows the form of implementation of the present invention, is a schematic front view of the entire induction heating apparatus.
FIG. 2 is a front view of the main part of the induction heating type device including an inductor.
FIG. 3 is a plan view of the main part of the induction heating type apparatus.
FIG. 4 is a side view of the main part of the induction heating type device.
FIG. 5 is a schematic diagram for explaining a method of replacing an inductor.
FIG. 6 is a schematic view of an inductor holding frame to which a guide plate is attached.
FIG. 7 is a schematic view showing a part of a hot rolling facility equipped with an induction heating type apparatus.
FIG. 8 is a front view schematically showing the entire conventional induction heating type apparatus.
FIG. 9 is a schematic diagram for explaining a method of replacing an inductor in a conventional induction heating apparatus.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Coarse rolling mill row | line | column 2 Induction heating type apparatus 4 Finishing rolling mill row | line | column 6 Table roll 10 Induction heating type apparatus 12 Bogie 16 Foundation 18 Base 20 Inductor holding frame 21 1st support | pillar 22 1st top frame 25 Upper inductor mount 31 2nd support | pillar 32 Second top frame 35 Lower inductor base 36 Connecting block 40 Upper inductor 45 Lower inductor 47 Heating coil 50 Upper inductor lifting device 51 Screw jack 52 Motor 54 Transmission shaft 55, 56 Distributor 58 Intermediate bearing 60 Lower inductor lifting device 61 Hydraulic jack 65 Intermediate shaft 75 Roll support frame 77 Guide plate 90 Induction heating type device 94 Inductor holding frame 95 Post 96 Top frame S Slab B Coarse bar H Hot rolled steel plate

Claims (2)

  A transverse induction heating apparatus comprising a carriage movable in a direction perpendicular to a rolling line, an inductor holding frame, an upper and lower inductor, and an upper and lower inductor lifting device, wherein the inductor holding frame From the 1st support | pillar and 2nd support | pillar extended upward from the chassis upper surface of the said trolley | bogie, the 1st top frame attached to the upper end of the 1st support | pillar removably, and the 2nd top frame attached to the upper end of a 2nd support | pillar The upper and lower inductors are suspended from the first top frame and the second top frame, respectively, and the upper and lower inductor lifting devices are attached to the first top frame and the second top frame, respectively. An induction heating type apparatus for hot rolling equipment. The induction heating type apparatus for hot rolling equipment according to claim 1, wherein a guide plate for guiding the first top frame and the inductor when the first top frame is lifted or hung is provided on the second top frame .

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